.sidebar {
  width: 280px;
  background: var(--bg-sidebar);
  color: white;
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.logo-section {
  padding: 2rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  flex-shrink: 0;
}

.logo-icon {
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-shrink: 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: transparent;
  border: none;
  border-radius: 12px;
  color: rgba(255, 255, 255, 0.7);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.95rem;
  font-weight: 500;
  width: 100%;
  text-align: left;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.08);
  color: white;
  transform: translateX(4px);
}

.nav-item.active {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.nav-icon {
  font-size: 1.5rem;
}

/* ===== DOCUMENT LIST ===== */
.doc-list-section {
  flex: 1;
  min-height: 0;
  padding: 0.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.doc-list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.5);
  padding: 0.5rem 0;
  flex-shrink: 0;
}

.doc-list-count {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 0.1rem 0.5rem;
  font-weight: 600;
}

.doc-list-empty {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.85rem;
  padding: 0.5rem 0;
}

.doc-list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-bottom: 0.5rem;
}

.doc-list-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 0.5rem 0.5rem 0.5rem 0.75rem;
  font-size: 0.8rem;
}

.doc-list-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: rgba(255, 255, 255, 0.85);
}

.doc-delete-btn {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: none;
  background: rgba(245, 101, 101, 0.15);
  color: #fc8181;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.doc-delete-btn:hover:not(:disabled) {
  background: rgba(245, 101, 101, 0.35);
}

.doc-delete-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.sidebar-footer {
  padding: 1.5rem 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.stats-card {
  background: rgba(255, 255, 255, 0.05);
  padding: 1rem;
  border-radius: 12px;
}

.stat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
  flex-shrink: 0;
}

.btn-theme-toggle {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-theme-toggle:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn-reset {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(245, 101, 101, 0.1);
  border: 1px solid rgba(245, 101, 101, 0.3);
  border-radius: 10px;
  color: #fc8181;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-reset:hover:not(:disabled) {
  background: rgba(245, 101, 101, 0.2);
  border-color: rgba(245, 101, 101, 0.5);
}

.btn-reset:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ===== MAIN CONTENT (shared shell) ===== */
.main-content {
  margin-left: 280px;
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: var(--bg-card);
  padding: 1.5rem 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 50;
}

.breadcrumb-item {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.status-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-main);
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  animation: pulse 2s infinite;
  flex-shrink: 0;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .sidebar {
    width: 240px;
  }

  .main-content {
    margin-left: 240px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  .main-content {
    margin-left: 0;
  }

  .topbar {
    padding: 1rem 1.5rem;
  }
}